Hi,
At Key on, engine off and fuel pump operating: 50-57 psi.
Hope I helped,
Luke
SOURCE: 1997 gmc sierra 1500 5.7 vortec got spark got fuel
You said you have fuel pressure but what is it? It has to be 55 psi or it won't even try.
SOURCE: 1998 GMC Sierra- runs rough then stalls when
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
SOURCE: what is the fuel pump pressure for a vortec 4.3l
2.2L Vin 4.... 41-47 psi Ignition switch is on and fuel pump running
2.2L Vin 5 ... 55-60 psi " "
4.3L Vin W .. 60-66 psi " "
4.3L Vin X ... 60-66 psi " "
SOURCE: Were is the fuel pressure
the fuel pressure regulator is located inside the intake. you have to remove the upper intake to access the regulator. the black plastic intake is what you need to remove.
Testimonial: "Thanks. I went straight to it. The diagram from autozone was standard and not what I was looking for. Thanks again!"
SOURCE: Location of coolant temperature sensor on 2003 GMC
on the left front of the block by the alt. 4.2 L engine
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